Under system "Spawn object by name"
spawn object (Variable name)
So let's say your variable (let's call it "fruit") has could be one of 3 different things. Apple, banana, or grape.
spawn object fruit
would spawn whichever one was currently selected (grape, apple, banana whatever. Please note if the variables name doesn't match an object it just won't spawn anything)
for your animating issue I have 2 solutions.
1. To have the animations set as the default under the actual animater
2. Do "when object is created OR on start of layout. Set object to animation" (replace animation with your animation name and object with your object name)